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Preparation method of electro-deposition graphene thin film lithium ion battery negative electrode plate

A graphene film, lithium-ion battery technology, applied in battery electrodes, electrode manufacturing, circuits, etc., can solve problems such as unfavorable production efficiency, long processing cycle, etc., and achieve the effects of low production cost, improved production efficiency, and stable structure

Active Publication Date: 2018-08-24
中国东方电气集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above invention also needs to be stirred and pulped, and coated into sheets, and its processing cycle is longer, which is not conducive to the improvement of production efficiency.

Method used

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  • Preparation method of electro-deposition graphene thin film lithium ion battery negative electrode plate

Examples

Experimental program
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Effect test

Embodiment 1

[0024] A preparation method of an electrodeposited graphene thin film lithium-ion battery negative pole piece, comprising the steps of:

[0025] (1) Configure polyacid H with pH=1-2 3 PMo 12 o 40 Solution, graphene oxide is dissolved in the prepared polyacid solution, and the obtained dispersion system is used as an electrodeposition solution.

[0026] (2) The copper foil is deposited in the electrodeposition solution, the potential range is set to -1.4 ~ 0.6V, the scan rate is set to 50 mV / s, and the deposition cycle is 50 times, and a 20-30um thick layer is deposited on the surface of the copper foil. Multi-acid-graphene composite film (i.e. H 3 PMo 12 o 40 - graphene composite film).

[0027] (3) Soak the prepared polyacid-graphene composite film in LiOH solution for 8-10 hours, make its hydrogen ions and hydroxide ions fully react, complete the exchange of hydrogen ions and lithium ions, and obtain polyacid lithium salt -graphene composite film; for Li 3 PMo 12 o ...

Embodiment 2

[0031] Replace polyacid with H 3 PW 12 o 40 , the obtained polyacid lithium salt-graphene composite film; for Li 3 PW 12 o 40 - Graphene composite film. The preparation method and testing method are the same as in Example 1.

Embodiment 3

[0033] Replace polyacid with H 4 SiMo 12 o 40 . Obtained polyacid lithium salt-graphene composite film; For Li 3 SiMo 12 o 40 - Graphene composite film. The preparation method and testing method are the same as in Example 1.

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Abstract

The invention discloses a preparation method of an electro-deposition graphene thin film lithium ion battery negative electrode plate. The preparation method comprises the following steps of (1) configuring a polyacid solution at pH of 1-2, and enabling graphene oxide to be dissolved into the configured polyacid solution to obtain a dispersion system used as an electro deposition liquid; (2) putting a copper foil into the electro deposition liquid for performing deposition on the surface of the copper foil to obtain a polyacid-graphene composite film; (3) enabling the prepared polyacid-graphene composite film to be soaked in a LiOH solution to enable hydrogen ions and hydroxide ions to be fully reacted to complete exchange of hydrogen ions and hydroxide ions to obtain a polyacid lithium salt-graphene composite film; and (4) performing cleaning and drying on the prepared polyacid lithium salt-graphene composite film. The negative electrode plate prepared in the method is high in compaction and uniformity, short in electro deposition time and capable of facilitating improvement of production efficiency.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a preparation method of electrodeposited graphene thin-film lithium-ion battery negative electrodes. Background technique [0002] As one of the most promising green products in the 21st century, lithium-ion batteries have been unanimously recognized by users. With the rapid development in recent years, lithium-ion battery products have begun to diversify, evolving from early consumer batteries to power batteries and energy storage batteries. However, the traditional lithium-ion battery raw materials and preparation technology severely limit the development of lithium-ion batteries. The preparation of traditional graphite negative pole pieces needs to be stirred and pulped, coated into sheets, and the processing cycle is at least 48 hours. The processing cycle is long and not It is beneficial to the improvement of production efficiency; graphene, as a new type of m...

Claims

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Application Information

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IPC IPC(8): H01M4/1393H01M4/04
CPCH01M4/0457H01M4/1393Y02E60/10
Inventor 廖小东黄兴兰
Owner 中国东方电气集团有限公司
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